Aoliwei IoT Technology Co., Ltd. is a high-tech enterprise based on computer technology, with intelligent software algorithms and IoT technology as its core, possessing precision measurement technology and high-precision self-control technology. By realizing the interconnection of equipment in all application scenarios, it achieves digital construction in the new era. The company is mainly committed to achieving smart cities and smart industries in various fields. The mission of ELV Technology is to integrate and solve various composite measurement needs of users in all scenarios. Through the integration and composite application of IoT technology and measurement technology, we aim to create a closed-loop device ecosystem for all scenario applications. Regardless of the user's application site, measurement purpose, and measurement accuracy, ELV technology can integrate measurement, remote transmission, data statistics, summarization, and other comprehensive needs that users may have through customization or semi customization, providing users with the most economical and practical closed-loop supporting services available today. ELV technology meets the multi-level needs of users at all levels: from the demand level, on-site measurement mainly includes three physical (analog) measurement needs of pressure, temperature, and flow, as well as three electrical parameter measurement needs of (AC/DC) voltage, current, and frequency. ELV DEV achieves the measurement needs of various users through various range pressure transmitters, temperature transmitters, temperature pressure integrated transmitters, differential pressure flow meters, electromagnetic flow meters, mass flow meters, multiple precision electrical parameter measurement modules, and composite application solutions of the above equipment. Combined with ELV IOT's IoT technology, it lays the foundation for the construction of the instrument IoT. There is a problem of centralized data collection and transmission at the measurement site. According to usage scenarios, user environments can be divided into scattered and dense between cities; There are four major categories: scattered outside the city and dense outside the city. Due to the different transmission limitations of each major category, traditional networking transmission methods are insufficient/inconvenient to meet the actual needs of various users. ELV IOT, equipped with various mainstream IoT communication technologies such as BLE/NBIOT/LORA/4G/GSM, combined with on-site wired networking methods such as RS485/HART, can help users solve their own environmental problems, facilitate the use of users at all levels, and meet the core needs of all users in the most economical and practical way.